Valve lathe



Sept. 23, 1924. 1,509,37

w. cfscHROx-:CK ET AL VALVE LATHE Filed Novum, 1922 2 sneeze-sheet 1 HHH Kv d

f u 9ms IIIlII MMV@ ATTORNEYS v ept. .23,l 1.924.

- w. c. scHRoEcK ET Al.

VALVE LATI-IE 2 Sheets-Sheet 2 Filed Nov. 24, 1922 M N mmm Mm am A 5K @W www Patented Sept. 23, 1924.

UNITED STATE-S ,VALVE LA THE.

Application filed November 24, 19u22. Serial22h10.1 l(Q fv,t)(fil=.

z @ZZ whom t may concern:

Be it ylinovvn that We, .WALTER CHARLES Sonnonoii and VILLIAM IviissMANN, both citizens of the United States,` and ,residents ofGhicago, in the county of Cook and State ot'Illinois7 Vhave invented a new and useful Improvement in Valve Lathes,` of Which the following' isa i'ull, clearyandlexact descrip- Ourinvention relates 4to improvements in valve llathes; and it consists in the combinations,` constructions, and arrangements' hereindesoribedrand claimed.H

`An object oi our'invention is to provide a valve lathe which is adapted to accurately cut a valve toan anglekoty 4:5 degrees, and which fmeans for rotating the valve and for moving theA cutter With respect to the valveduring the cutting operation.

i A further Iobject of our invention `is to provide a device ci the character described which hasfa novel fchuck' .fer holding" the valve. l

"in further object of `our invention is to provide kfz't'fdei'fioeot the character described which has'novel means for moving thel cutter with respect tothe'valve 'and for holding the cutter in adjusted position.

A further object oi" our yinvention is `to A5&0 provide a device of the character described Lvvhichhas automaticlmeaiis 'for moving the cutter `at anai'igle of 445 degrees to the valve While "the cutting operation is being accomplished,v Wherebyth'e valve is provided With an ledge which is accurately disposed at 45 degrees Withiespect to the longitudinal axis ci the valve.

A ,urtherobject of our invention is to provide fa devicey of the character described vvhicli is relatively simple -in construction and `which makes use of common means for rotating'thel valve and for movingthe cuttying member alongthe valve during' the grinding operation. L5 Other objects and advantages Will appear in the following specification, andthe novel yeatures'of the invention will be particularly pointed yout in the appended claims.

Qur invention is illustrated in the accomrallying drawings, forming .part 0f this ar- Figure l1 is a plan view yof the device. Fig-ere 215,3. section" aiQigfthe 'line-,efe

.y r1 i, 4in .mtr 1 Figure 3. is anhenlarged detailed lView O the Cirugia 'portiers' thereofbeing "n m4 'Jr lil-r l i.

` Fi irre" 4 yisla section along the line In carrying out ourvinvention, We provide a base 1 f'wvhifc'h carries* integral bearings@ andl 8. These ybearings are alinedl and are adapted to supporta shaft 4 vvhi'ch is" rotatabl'y"disposedfthereinl 'The shaft .t'ilcarries a novel chuck 5 toY be hereinafter described, 65 andalso lcarries a beveled gear 6. Cellars? a'ndL are rigidly securedto the shaftI and bear' against the' sides'xof the `bearing 2, thereby' preveiiting longitudinal 'movement ofthe sliaftfl""w`ith yrespect to thelbeaiings 7c 2' and 3. Ay ervankhandle l9 is secured'to tthe free rend ottheshaiitl and is adapted'to iota@ the Shaft.

" 'Thebaseflfalvso carries bearings 10 and o 11`.""A"`s`tub shaft 12 (see Figure'2)" is'jro- 75 tatably a'rried 'by thefbearings1 10 and' 11 ad "Sappemeer-led 'gern which is in meslitvitlrthe gear 6 and also"sip`portsa gear `111. The gear 111 islrigyidly secured to the vstub sha-i612 and'isadapted t rotate lwhen the fgear is rotatedf It ristobe noted that" the stublshait 12 extends at an angle e145 degrees to the axisof the shaft 4. `shaft 15 is disposed beneath the jstub shaft 12 i(see F igiire 2)' and lies the same 85 plane. The shaft '15( entends beneath the chuck 5 and isadapted to move'a cutter carrying member 16. Thel member 16 is slidably mounted on guide members 17 and is adapted to b e moved alongI the guide members. yThe end' lof the shattl is threaded at 18 and is received in athreadedfbo're (not shown) in the member 16, Ywherebyrotation df the shaft 15 Will move the member 16 alongl the guides 17. A screw 19 Aextends at 95 right anglesto Vthe shaft 17 and is carried by the member 16. A cutter vice'QO is slidably vcarried by the member 16' andfis adapt- Yio ed to move at right angles to the shaft 15. A rotation of the screw 19 by means of a crank handle 21 will move the vice 20 along the member 16. The vice 20 adjustably carries a cutter 22.

Rotation of the shaft 15 will move. the cutter 22 in the direction of the longitudinal axis of the shaft, while a rotation of the shaft 19 will move the cutter in the direction of the shaft 19 and at right angles to the longitudinal axis of the shaft 15.

From the foregoing description of thev various parts of the device, the operation thereof may be readily understood. When it is desired to grind a valve 23, a cutter 22 is disposed in the vice 20 and the vice is moved by means of the screw 19 and the shaft 15 so as to position the cutter adjacent to the outer edge. of the valve 23. It will now be observed that when the crank 9 is rotated, the valve 23 will be rotated and the cutter 22 will be moved along the surface 24 of the valve by means of the shaft 15 and member 16. The shaft 15 is operatively con* nected to the stub shaft 12 by means of a gear 25 which is in mesh with the gear 14. During the grinding operation, the valve 23 is rotated and the cutter 22 is moved at an angle of degrees to the longitudinal axis of the valve, the cutter all the time engaging with the surface 24 of the valve. lt will therefore be apparent that the. valve will be provided with a surface 24 that extends at an angleof 45 degrees to the axis of the valve. rlhe movement of the cutter and the rotation of the valve v23 are adjusted so as to rotate the valve at the desired i speed with respect to the cutter. The cutter 22 gradually works its way along the side 24 of the valve during the cutting operation I and it will be obvious that the valve 23 will be rotated through anumber of revolutions as the cutter is gradually moved along the side 24. u i

In Figure 4 we have shown a novel chuck for holding the valve 23. It will be noted that the shaft 4 is threaded at 30 and receives two knurled nuts 31 and 32. rlhe inner faces of the nuts 31 and 32 are provided with cam-shaped recesses 33 and 34, respectively. A sleeve 35 is loosely mounted upon the threads 30 and has grooves 36 therein which are alined with the grooves 36l (see Figure 4). Dogs 3T are disposed iu the grooves 36. The dogs 37 have outwardly extending ends 38 which are received in the recesses 33 and 34. The shaft 4 has slots 39 .therein which extend inwardly from the end of the shaft 4. It is obvious from this construction that a. rotation of the nuts 31 and 32 so as to move the nuts ytoward 'each other will cause the dogs v37 tomove toward the longitudinal axis of the shaft 4 and to grip the stem of the valve 23.

together, the dogs are first disposed in the slots 39 and then are aligned with the grooves 36 of the sleeve 35 to permit the sleeve to be passed over the dogs and be received in the bearing 3. rotated so as to dispose the ends 38 in the recess 33. The nut 32 is now disposed upon the shaft 4 and is rotated so as to receive the other ends 38 of thc dogs 37. The chuck is now ready to rigidly hold a valve 23 therein. lVhen there is no valve disposed within the chuck, the dogs are free to move toward or away from each other. The

4cam surfaces 40 of the dogs are adapted to move the dogs outwardly when the Stem of the valve 23 is disposed in the bore of the shaft 4. After the stem of the valve 23 is disposed within the chuck 5, the nuts 31 and 32 may be rotated so as to be moved toward each other, whereupon the cam sides H of the slots 33 and 34 will engage with the dogs 3"( to move them into ripping engagement with the stem of the valve 23. The valve is now rigidly held in position and moreover is automatically alined with the axis of the shaft 4. When the shaft 4 is rotated by means of the crank 9, the chuck rotates in the bearing 3. In this instance, the sleeve 35 acts as a bushing for the chuck. rlhe chuck is very novel in construction and consists of a minimum number of parts which are adapted to automatically grip and aline a valve with the axis of the shaft 4 when the nuts 31 and 32 are rotated.

The cutter feeding means and the chuck co-act to provide a device which is very efficient for the purpose intended. The device may be manually or machine operated and in the present instance, is actuated by the crank 9. The device is readily portable, since it is mounted upon a base that may be readily moved.

lVe claim:

l. A valve lathe comprising a base, shaft carrying bearings projecting upwardly from said base, a hollow shaft having a slotted end, valve stem engaging members disposed in said slots, a sleeve mounted on the slotted end of said shaft and having grooves to receive said members, said Sleeve bein mounted in one of said bearings and sai shaft being mounted in another bearing, and means for moving said members into engagement with a valve stem.

2. il valve lathe comprising a base, shaft carrying bearings projecting upwardly from said base, a hollow shaft having a slotted end, valve stem engaging members dis osed in said slots, a sleeve mounted on the s otted end ofv said shaft and having grooves to receive said members said sleeve bein mounted in one of said bearings and Sai shaft being mounted in another bearing, means for moving said members into en- The nut 31 is gagement With a valve stem, a second shaft operatively connected to said rst named shaft, a cutter adapted to be moved into an angle with respect to the valve, means for moving the eut-ter at 45 degrees with respect to the first shaft, and means for moving said cutter at right angles to said second named shaft. 

